Обновить 'README.md'

README.md

@@ -42,4 +42,14 @@ avto4certbot.sh --help; this help
 ## autocertbot
 24 01 * * * root /etc/avto4certbot/avto4certbot.sh --update nginx
 ```
+
+* check work - create on server:
+```
+echo "WELCOME" >/var/www/certbot/www/.well-known/acme-challenge/test.txt
+```
+* check from an external client:
+```
+curl -ikL http://mydomen.ru/.well-known/acme-challenge/test.txt
+```
+
 License: GPLv2.0